package com.lh.threadtest.test3;

/***
 * 
* @ClassName: Test 
* @Description: 面试题3
* @author Liu
* @date 2018年1月19日 下午3:46:27 
*
 */
//不能改动此Test类	
public class Test extends Thread {

	private TestDo testDo;
	private String key;
	private String value;

	public Test(String key, String key2, String value) {
		this.testDo = TestDo.getInstance();
		/*
		 * 常量"1"和"1"是同一个对象，下面这行代码就是要用"1"+""的方式产生新的对象，
		 * 以实现内容没有改变，仍然相等（都还为"1"），但对象却不再是同一个的效果
		 */
		this.key = key + key2;
		this.value = value;
	}

	public static void main(String[] args) throws InterruptedException {
		Test a = new Test("1", "", "1");
		Test b = new Test("1", "", "2");
		Test c = new Test("3", "", "3");
		Test d = new Test("4", "", "4");
		System.out.println("begin:" + (System.currentTimeMillis() / 1000));
		a.start();
		b.start();
		c.start();
		d.start();

	}

	public void run() {
		testDo.doSome(key, value);
	}
}

class TestDo {

	private TestDo() {
	}

	private static TestDo _instance = new TestDo();

	public static TestDo getInstance() {
		return _instance;
	}

	public void doSome(Object key, String value) {

		synchronized (key)
			// 以大括号内的是需要局部同步的代码，不能改动!
			{
				try {
					Thread.sleep(1000);
					System.out.println(key + ":" + value + ":" + (System.currentTimeMillis() / 1000));
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
	}

}